*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --black: #0a0a0a;
  --grey-600: #6b6b6b;
  --grey-300: #d4d4d4;
  --grey-100: #f5f5f5;
  --white: #ffffff;
  --accent: #e8440a;
  --accent-light: #fff1ec;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--white);
  color: var(--black);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 48px;
  border-bottom: 1px solid var(--grey-300);
  position: sticky;
  top: 0;
  background: var(--white);
  z-index: 100;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.nav-logo > span {
  font-family: 'Instrument Serif', serif;
  font-size: 1.1rem;
  color: var(--black);
  letter-spacing: -0.01em;
}
.nav-logo .accent { color: var(--accent); font-style: italic; }
.nav-cta {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--grey-600);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-cta:hover { color: var(--accent); }

/* HERO */
.hero {
  max-width: 760px;
  margin: 0 auto;
  padding: 88px 24px 64px;
  text-align: center;
}
.hero-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.hero h1 {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--black);
  margin-bottom: 20px;
}
.hero h1 em { font-style: italic; color: var(--accent); }
.hero p {
  font-size: 1.05rem;
  color: var(--grey-600);
  max-width: 520px;
  margin: 0 auto;
  font-weight: 300;
  line-height: 1.7;
}

/* CALCULATOR */
.calculator-wrap {
  max-width: 680px;
  margin: 0 auto 100px;
  padding: 0 24px;
}
.card {
  background: var(--white);
  border: 1px solid var(--grey-300);
  border-radius: 16px;
  padding: 48px;
}
.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grey-600);
  margin-bottom: 28px;
}
.field-group { margin-bottom: 28px; }
.field-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--black);
  margin-bottom: 8px;
}
.field-group .hint {
  font-size: 0.78rem;
  color: var(--grey-600);
  margin-top: 6px;
  line-height: 1.5;
}
.field-group .hint a { color: var(--accent); text-decoration: none; }
.field-group .hint a:hover { text-decoration: underline; }
.input-row { display: flex; gap: 10px; }

input[type="text"],
input[type="number"],
select {
  width: 100%;
  padding: 13px 16px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  color: var(--black);
  background: var(--grey-100);
  border: 1.5px solid transparent;
  border-radius: 10px;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
  appearance: none;
  -webkit-appearance: none;
}
input:focus, select:focus {
  border-color: var(--accent);
  background: var(--white);
}
input::placeholder { color: #aaa; }

.currency-select {
  width: 90px;
  flex-shrink: 0;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b6b6b' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

.error-msg {
  display: none;
  font-size: 0.78rem;
  color: var(--accent);
  margin-top: 6px;
}
.error-msg.visible { display: block; }

.divider {
  border: none;
  border-top: 1px solid var(--grey-300);
  margin: 36px 0;
}

/* BUTTON */
.calc-btn {
  width: 100%;
  padding: 16px;
  background: var(--black);
  color: var(--white);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  margin-top: 8px;
  transition: background 0.2s, transform 0.1s;
  letter-spacing: 0.01em;
}
.calc-btn:hover { background: var(--accent); }
.calc-btn:active { transform: scale(0.99); }

/* RESULTS */
.results { display: none; margin-top: 40px; }
.results.visible { display: block; }
.results-site {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--grey-600);
  text-align: center;
  margin-bottom: 28px;
  font-style: italic;
}

.big-loss {
  background: var(--black);
  border-radius: 14px;
  padding: 36px;
  text-align: center;
  margin-bottom: 20px;
}
.big-loss-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 10px;
}
.big-loss-number {
  font-family: 'Instrument Serif', serif;
  font-size: clamp(2.8rem, 7vw, 4.2rem);
  color: var(--white);
  line-height: 1;
  letter-spacing: -0.02em;
}
.big-loss-number span { color: var(--accent); }
.big-loss-sub {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
  margin-top: 10px;
}

.metrics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 20px;
}
.metric-card {
  background: var(--grey-100);
  border-radius: 12px;
  padding: 22px 20px;
}
.metric-card.accent-card {
  background: var(--accent-light);
  border: 1px solid #ffd0bc;
}
.metric-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--grey-600);
  margin-bottom: 8px;
}
.metric-value {
  font-family: 'Instrument Serif', serif;
  font-size: 1.8rem;
  color: var(--black);
  line-height: 1;
  letter-spacing: -0.02em;
}
.metric-card.accent-card .metric-value { color: var(--accent); }
.metric-desc {
  font-size: 0.75rem;
  color: var(--grey-600);
  margin-top: 6px;
  line-height: 1.4;
}

.assumption-note {
  background: var(--grey-100);
  border-radius: 10px;
  padding: 16px 20px;
  font-size: 0.78rem;
  color: var(--grey-600);
  line-height: 1.6;
  margin-bottom: 28px;
}
.assumption-note strong { color: var(--black); }

/* SHARE BLOCK */
.share-block {
  border: 1.5px dashed var(--grey-300);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 20px;
}
.share-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--grey-600);
  margin-bottom: 12px;
}
.share-row { display: flex; gap: 10px; align-items: center; }
.share-url {
  flex: 1;
  font-size: 0.8rem;
  color: var(--grey-600);
  background: var(--grey-100);
  border-radius: 8px;
  padding: 10px 14px;
  font-family: 'DM Sans', sans-serif;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.copy-btn {
  padding: 10px 18px;
  background: var(--black);
  color: var(--white);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s;
  flex-shrink: 0;
}
.copy-btn:hover { background: var(--accent); }
.copy-btn.copied { background: #16a34a; }
.share-hint {
  font-size: 0.73rem;
  color: var(--grey-600);
  margin-top: 8px;
}

/* CTA */
.cta-block {
  border: 1.5px solid var(--grey-300);
  border-radius: 14px;
  padding: 32px;
  text-align: center;
}
.cta-block h3 {
  font-family: 'Instrument Serif', serif;
  font-size: 1.5rem;
  color: var(--black);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.cta-block p {
  font-size: 0.88rem;
  color: var(--grey-600);
  margin-bottom: 22px;
  line-height: 1.6;
}
.cta-btn {
  display: inline-block;
  padding: 14px 32px;
  background: var(--accent);
  color: var(--white);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 10px;
  text-decoration: none;
  transition: opacity 0.2s;
}
.cta-btn:hover { opacity: 0.88; }

/* FOOTER */
footer {
  border-top: 1px solid var(--grey-300);
  padding: 28px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-logo {
  font-family: 'Instrument Serif', serif;
  font-size: 0.95rem;
  color: var(--grey-600);
  text-decoration: none;
}
.footer-logo span { color: var(--accent); }
footer p { font-size: 0.75rem; color: var(--grey-600); }

@media (max-width: 600px) {
  nav { padding: 18px 20px; }
  .hero { padding: 56px 20px 48px; }
  .card { padding: 28px 22px; }
  .metrics-grid { grid-template-columns: 1fr; }
  .share-row { flex-direction: column; }
  .share-url { width: 100%; }
  footer { flex-direction: column; gap: 10px; text-align: center; padding: 24px 20px; }
}